The Thonet is a unit equivalent to four layers of clothing on the upper body, as defined by IEEE 2745.2B. This may include, but is not limited to, T-shirts, undershirts, "wifebeaters", sweatshirts, sweaters, coats, jackets, polos, basketball jerseys, vests, tuxedos, overalls, tunics, raincoats, parkas, jumpsuits, and turtlenecks.

Dude, why are you wearing an entire Thonet when it's 65 degrees out?" "The ladies love the layers, that's why. Hold my V-neck while I slip into this denim jacket here."